款东风本田思域发动机燃油排放控制系统技术信息指南英文版可编辑Word文档格式.docx
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differenceresultingfromVTEC'
sswitchingtothedelayedintake
Intelligent
valveclosuremodeandcoordinationwiththevehiclestability
MAPsensorpowerIC
assistVSAcontrolHighlypreciseintakeairflowcontrol.MassairflowMAFisusedin
conjunctionwithasensorformanifoldabsolutepressureMAPin
ordertoimproveidlingoperationcontrol.
FI/DBW
Micro-UseofalinearairfuelLAFsensortogetherwithanO2sensor,
LAFsensor
computer
PRISMPredictionandIdentificationSlidingModecontrol
consistingofcylinder-by-cylinderfeedbackcontrol,andanMAF
andMAPcombinationformoreaccurateestimationofintake
airflow.Thissystemprovideshighlypreciseair/fuelcontrolforATmicrocomputer
O2sensor
betterfuelefficiencyaswellasloweremissionsImprovedexhausttemperaturemanagementcontrol.Thisconsists
ofenginefiringcontrolforquickenginewarm-upandconsequent
earlieractivationofthecatalyzerlocatedbelowtheexhaust
EGRvalve
manifold.ImprovedtemperatureestimationaccuracyoftheO2
sensorelementisanotherfactorpermittingearlierdeterminationofcatalyzeractivationExhaustgasrecirculationcontrolnotonlyforloweringtheexhausttemperature,butalsotakesincreasedadvantageofthe
stoichiometriczonebyimprovingfueleconomyandNOxreductionAdvancedtemperaturemanagementcontrolappliedtothecatalyzerbelowtheexhaustmanifoldOptimumlocationoftheECUintheenginecompartment.
Emissions-12005HondaMotorCo.,Ltd.?
AllRightsReserved.
05/09/09
ProgrammingNotes
VoiceoverNarrator,Male2005HondaMotorCo.,Ltd.?
05/09/09ScreenNumber3.1-2
Page2of18
MisfireDetectionSystemThe2006Civic'
smisfiredetectionsystemusesapulsarplatethat
issecuredwiththreeboltstoacrankshaftweightinsidethe
crankcase.Increasedinstallationaccuracyensuresthatallmisfire
patternsaredetectable.
Pulsarplateinstalledon
crankshaftweightSinceallmisfirepatternsaredetected,thecylindermostdamaging
fastenedwith3bolts
tothecatalyzercannowbeidentifiedanditsfuelsupplycut,thus
limitinganydamagetothecatalyzer.
ServiceTalksWhenthesystemdetectsamisfire,themalfunctionindicatorlight
MILflashesandthesupplyoffueltothemisfiringcylinderis
interrupteduntiltheignitionswitchisturnedOFFEvenafterrecoveryfromafailure,theMILcontinuesflashing,fuel
supplytothecylinderremainsinterrupted,andthecorresponding
transientDTCissetIfmisfiringrepeatedlyoccursinanotherdrivingcycle,theMIL
Crankanglesensor
continuouslyflashes,fuelsupplytothecylinderremains
installedonL/B
interrupteduntiltheignitionswitchisturnedOFF,andthe
correspondingDTCissetWhentheignitionswitchisreturnedtoONinthenextdrivingcycle,
theMILcomesonindicatingmisfiringhasoccurred,andthisstate
continuesuntiltheDTCiserasedIfnoothermisfireoccursafteratransientDTChasbeenset,the
DTCisautomaticallyerasedfromthememoryafterthenext80
drivingcycles.
Emissions-22005HondaMotorCo.,Ltd.?
05/09/09ScreenNumber3.1-3
Page3of18
Two-Bed,Large-DiameterCatalyzerUsingLowerAmountof
PreciousMetalBelowExhaustManifoldThe2006Civicisequippedwithatwo-bedtypelarge-diameter
catalyzerusingloweramountofpreciousmetalbelowtheexhaust
manifold.Thecatalyzerisfittedjustbelowthecylinderhead
integratedexhaustmanifold.
Emissions-32005HondaMotorCo.,Ltd.?
05/09/09ScreenNumber3.1-4
Page4of18
EGRSystem:
EGRGasesfromCatalyzer
OutletDirectlytoIntakeManifoldTheEGRsystememployedinthe2006Civic
takesEGRgasesfromthecatalyzeroutletand
leadsthemdirectlytotheEGRjointthatis
attachedtotheplasticintakemanifoldchamber
onthecylinderheadThissystemsolvesEGRclogged-passage
problems,improvestheemissionlevel,and
enhancesfueleconomy.
EGRJoint
Emissions-42005HondaMotorCo.,Ltd.?
05/09/09ScreenNumber3.1-5
Page5of18
EGRPipeInstallationProcedure
1.Placethethermo-caseendoftheEGRpipeon
thethermo-casestuds.
2.LooselyfastenthepipeendusingtheM8flange
nuts.
3.Attachthecatalyzerendofthepipetothe
connectinglocationonthecatalyzerbyloosely
fasteningtheM8flangebolts,andthentighten
theboltstothespecifiedtorque.
4.Finally,tightentheM8flangenutsonthe
thermo-caseendofthepipetothespecified
torque.
ServiceTalksInordertocompensateforthedimensional
differenceinrelatedparts,theholesinthe
intakemanifoldendoftheEGRpipearemade
largerthanthoseinthecatalyzerendofthe
pipe.Forthisreason,itisveryimportantto
followtheproceduredescribedabovetoavoid
givingexcessivestresstotheEGRpipeIftheprocedureisnotfollowedexactly,
excessivetighteningstresswilloccurinthe
weldsofthepipe.Thiscouldresultincracks
andconsequentbreakageofthepipe.
Emissions-52005HondaMotorCo.,Ltd.?
05/09/09ScreenNumber3.1-6
Page6of18
MAF:
MassAirFlowSensor
AirflowmetermainunitAhot-wiretypemassairflowsensorisinstalled
Temperature-compensatingresistor
betweentheaircleanerandtheintakemanifold
todetecttheintakeairvolumeThismassairflowmeterconsistsofaheat
BypassTointakepipe
elementandatemperature-compensating
flow
resistor.Theheatelementoperatestokeepa
Heatelement
constanttemperature.
Hotwire
MainflowAstheintakeairvolumepassingaroundthe
heatelementchanges,theresistanceofthe
elementchangesandthereforethecurrent
Hotwiremassairflowmeter
flowingthroughtheelementchanges.This
currentvalueismonitored.LargeThecurrentvalueisconvertedintovoltageand
usedassignalSignalvoltagechangesaccordingtothe
current.
Small
SmallIntakeairvolumeLarge
Outputproperty
Emissions-62005HondaMotorCo.,Ltd.?
SignaloutputcurrentScreenNumber3.1-7
Page7of18
IntakeAirflowandFuelControlby
MAF+MAP-Part1
ControlusingMAFdata
Three-wayCatalyticConverterMAFmakesitpossibletomeasureintakeairflowdirectly,which
Fuelamount
increasestheaccuracyoffuelamountcalculation.Expected
Masscalculation
Engine
resultsaremorepreciseair/fuelratiocontrolandloweredemission
accordingtoactual
AirFlow
intakeairflow
level.
FuelamountcorrectionControlusingonlyMAFdatawouldnotaccommodatetransient
coefficient
characteristicsofthethrottlevalveduringstartupandaccelerationControlusingonlyMAPsensoroutputswouldnotbesufficiently
accuratebecausethedataderivedfrombasicfuelinjection
ControlusingMAPsensordata
amountcalculation,VTCfuelcorrectionandEGRfuelcorrection
Differencesanderrors
involvesdifferencesanderrorsundertransientconditions.
includedunder
transientconditions
VTCfuel
VTCangle
correction
sensor
Basicfuel
MAP
amount
calculation
Fuelamountcorrection
EGRfuel
EGRliftcoefficient
Emissions-72005HondaMotorCo.,Ltd.?
05/09/09Intake
airflow
ScreenNumber3.1-8
Page8of18
MAF+MAP-Part2
Intakeairflowovershoots